GM Service Manual Online
For 1990-2009 cars only

Condition

Cause

The lock system does not unlock.

    • A collapsed shear flange on the sector shaft
    • A damaged lock bolt
    • A damaged lock cylinder
    • A damaged housing
    • A damaged sector or rack
    • A damaged actuator rod
    • A damaged ignition switch
    • A damaged key cut
    • An incorrect key cut
    • The shift lever is not in the PARK position.
    • The park lock cable is incorrectly adjusted.
    • The park lock components are damaged.